Acquisitions (Consideration Transferred) (Details) (National Pump, USD $) In Millions, unless otherwise specified	1 Months Ended
	Apr. 30, 2014
Business Acquisition [Line Items]
Cash consideration	$ 773	[1]
Contingent consideration	76	[2]
Total purchase consideration	849	[3]
Cash consideration, cash paid	714	[1]
Cash consideration, hold back amount	59	[1]
Stock issued, excluded from purchase consideration	15
Adjusted EBITDA 12 Months Post-Closing
Business Acquisition [Line Items]
Maximum payout	75
Trailing EBITDA period	12 months
Adjusted EBITDA	134
Post-closing period	12 months
Adjusted EBITDA 18 Months Post-Closing
Business Acquisition [Line Items]
Maximum payout	50
Trailing EBITDA period	12 months
Adjusted EBITDA	$ 161
Post-closing period	18 months

[1] Consists of cash paid of $714 and a ‘hold back’ of $59 that was paid in April 2015.

[2] Reflects the acquisition date fair value of the following additional potential cash consideration to be paid based on the achievement of the following financial targets (see note 6 to our condensed consolidated financial statements for a discussion of changes to the fair value subsequent to the acquisition date):1.A maximum payout of $75 if National Pump's trailing twelve months adjusted EBITDA (as defined below in “Management’s Discussion and Analysis of Financial Condition and Results of Operations- Financial Overview”) reaches $134 twelve months post-closing; and2.An additional maximum payout of $50 if National Pump's trailing twelve months adjusted EBITDA reaches $161 eighteen months post-closing.

[3] Total purchase consideration excludes $15 of stock which was issued in connection with the acquisition and will be treated as compensation for book purposes but primarily represents deductible goodwill for income tax purposes.